Warp-tension mechanism for looms.



No. 724,471. 7 PATENTED APR. 7, 1993. H. HAUTMANN.

WARP TENSION MECHANISM FOR LOOMS. APPLIGATION FILED NOV. 29, 1902.

NO MODEL.

r" 3 4 f E a T f r 2 2 1 f I 72 1f )3 15 i1 0 r J 5 Z 12 x 15 10 7 a I i UNITED STATES "P TENT O FICE.

HE'N R-Y HAUTMANN, or PHILLIPSB'URG, NEW JERSEY.

WARP-TENSION] MECHANISM FOR Looms SPECIFICATION forming part ofLetters Patent No. 724,471, dated April 7,1963; I Application filed November 29,1902- Serial No. 133,2 51. (No model.)

To all whom it may concern.-

Be it known that HENRnHA-urmm a citizen of the United States, residing at-Phi'llipsbnrg,,in the. countypf 'Warren and State.

of New Jersey, have invented a new and use ful Warp-Tension Mechanism for Looms, of which the following is a specification.

The invention relates to certain improve-- merits in looms, particularly to mechanism employed for holding the warp-threads under constant tension. f

The principal object of the invention is to provide anautomatic tension device in which the tension on the beam will'be gradually de creased as the threads are withdrawnv dur-' ing the weaving operation in order that the threads, may be held under practically the same tensional strain without regard to' the quantity carried by the beam. a

With this and other objects in view the invention consists in the novel construction and arrangement of parts hereinafter described,

illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changesin the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of-the invention.

In the-accompanying drawings, Figure 1 is a rear elevation of suflicient of aloom to illustrate the application thereto of a tension mechanism constructed in accordance with my invention.

I Fig. 2 is a sectional plan view of the same on the line 2 2 of Fig. 1. Figs.

8 and 4 are views of details of construction more particularly referred to hereinafter.

In looms as now constructed and operated particularly where warp-threads of great length are used, much difficultyis experienced in maintaining the threads under the same .tension during the whole of the weav- I ing operation. When a full beam is placed in theloom, the tension mechanism is weighted in order to hold the threads under suifi-' cient strain to form a fabric of the desired quality; but as the warp is withdrawmfrom the beam it becomes necessary to gradually.

remove the, weights to properly proportion the strain to the quantityjof threatf remaining. This is generally doneat-intervals'and in. many cases results in unevenness jandir regularity in'the weaving. In carrying out my'invention these difficulties are overcome by providing a mechanism which will automatically adjust the strain on the beam in proportion to'the quantity of thread thereon.

In thedra-wings, 1 is a warp-beam of ordi nary construction provided with trunnions 2 at .its opposite end and supported in the loom frame in the usual manner. 'At each end of v the beam is a friction-drum 3, around which passes a chain 4, weights being applied-to the chain in order to resist .iree turning movementof the beam, and oneend of each chain is secured to acounterweight 5 or in some cases to a rigid lug. or bracket, in accordance with the character ofthe loom and the class of goods to be.woven. v

At the central portion of the. loom-frame is a standard 6, carrying a pivot-pin 7,. on which are mounted two arms 8, the arms being connected at points near their outer ends with the friction chains or bands 4; The pivotpin also supports a double drum 10, to which are secured the inner ends'of a. pair of flexible chains or cords 11, which extend out toward" the sides of the'loom and are'guided over sheaves 12, mounted in brackets 13, oarried by the arms. Oneach arm is mounted an adjustable roller 15, having a central opening for the passage of the upper end of a weight-supporting rod ,16, the rod having a horizontal portion passing through the cen--- ter of the roller and provided at one end with an eye for the reception of the cord or chain 111 Each rod 16 is provided at its lower end wit which any desired number of weights 19. may be placed, the number of weights being'iproportioned to the quantity of warp on the beam when the latter is first placed in position in. the'loom and at a time when the rollers .are adjacent to the outer ends of thea'rms.

The standard 6 is provided with a vertically-disposed guideway 20 for the reception of a vertically-movable bar 21, having its lower endsecured bya flexible chain or'cord' 22 to one side of the drum 10. The upper end of the bar 21'is provided with a bracket or'yoke 23, having bearings for the reception of the ends of a follower-roller 24, which is pressed into contact with .the;.,,warp-threads on; the beam 1 by the action of the weights an enlarged knob or. crossbar 18 on 19 intendin uo travel down the inclined arms 8 toward the pivot-point of said arms.

In the operation of the device a filled warpbeam is placed in position in the loom and weights as'the latter gradually move toward the pivot-pin 7. As the weights near the pivotal point of the arms the effective leverage is of course greatly decreased, and the strain exerted on the chains or hands 4 is gradually lessened and'permitting the warp-beam to turn more freely and at the same time maintain uniform tension on the threads.

The arrangement of thechains or bands 4 may be varied in accordance with the character of the loom, and in some cases may take the form of the ordinary'friction-hands secured at one end to the opposite point and at the opposite end to a weighted arm, or a single Weighted arm and warp beam drum may be employed in connection with a foly lower Without departing from the invention.

Having thus described the invention, what is claimed is- 1. The combination in a loom, of the warpbeam having a friction-drum,'friction devices in engagement therewith, a pivotally-mounted arm, a weight movable longitudinally of the arm, a drum mounted concentric with the pivot-point of the arm, a flexible connection between thedrum and'weight to adjust the position of the latter in accordance with the position of circumferential adjustment of the drum, and a follower held against the warpthreads for adjusting the position of said drum. v

2. The combination in a loom, of the warpheam having a friction-drum, friction devices in engagement therewith,.a pivotally-mounh ed arm, aroller mounted on the arm, a weight carried by the roller, a drum mounted concentric with the pivot-point of the arm, a flexible connection between the drum and the roller to adjust the position of the weight I in accordance with the position of circumferential adjustment of the drum, and a follower held against the warp-threads foradjusting the position of said drum v 1 3. Thecombination in a loom, of a Warpbeam having a friction-drum, friction devices in engagement therewith, a pair of pivotallymounted arms, means for connecting said arms to the friction devices, rollers mounted on the arms, brackets carried by said arms, weights supported by the rollers, a: drum mounted concentric with the arm and rollers, a vertically-disposed guide, a bar mounted thereima rolleradapted to hearings on the bar and held in contact with the warp-threads on the beam, and a-flexible' connection be tween the bar and drum to thereby adjust rollers. I t I In testimony. that. Iclaim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

' HENRY HAUTMANN'. Witnesses:

J. I. BLAIR REILEY, WALTER 'C. REYNOLDS.

the position of the drum and'tlie Weighted 

